Too much sun can do more than turn your skin red or brown—it can actually make you sick. About the experts Farah Moustafa, MD ...

What it looks like: Actinic keratoses are pre-cancerous changes to the skin caused by sun damage, explains Dr. Zeichner. “The rash feels like sandpaper when you run your fingers over it.” ...

Skin reactions can be alarming, especially when they appear suddenly. Many people struggle to tell the difference between hives and a rash ... it often presents as dark brown, purple or gray ...

Alfonsi said she’s seen patients develop second-degree sunburns with blistering, unexplained rashes or dark patches ... use can cause sun sensitivity. How to protect your skin, especially ...